What is CVE-2026-9918?

CVE-2026-9918 is a critical-severity vulnerability in Google Chrome, classified under Improper Privilege Management. CVSS score: 9.6/10. Published 2026-05-28.

How severe is CVE-2026-9918?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Privilege escalation in Google Chrome

CVE-2026-9918

Inappropriate implementation in Tint in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Privilege Escalation

EPSS: 0.001 (24.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Google Chrome — versions 148.0.7778.216

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

chrome-cve-admin@google.com (Release Notes)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-9918?: CVE-2026-9918 is a critical-severity vulnerability in Google Chrome, classified under Improper Privilege Management. CVSS score: 9.6/10. Published 2026-05-28.
How severe is CVE-2026-9918?: Critical severity. CVSS v3 base score is 9.6 out of 10.